Generally speaking the performance is in line with what you’d expect with a pleasingly linear increasing scale showing clearly what you get for your money. The exception in the graphs is in Doom 3 where the X800XL is outpaced at all resolutions when FSAA and AF are enabled. the xplanation for this is simple though. The XL was tested back in mid-December with an older driver (4.11 – so in fact it’s good news again as it demonstrates how hard ATI has been working to make up for nVidia’s lead in that title. If tested with the current driver (5.3) I’d expect the XL’s Doom 3 scores to increase bringing in back into line.
It’s also interesting to see how stressful Far Cry still is for graphics cards over a year since its release, with the title returning lower scores than Doom 3.
So what do you lose by saving money and going for a 12-pipe ATI card over a 16-pipeline card? What it does is essentially rule out 1,600 x 1,200 with FSAA and AF as a playable resolution –if you really want to crank it up you’ll going to have to plump for a more powerful card. What’s more, the 3.46GHz Extreme Edition Pentium 4 that these tests were conducted on is still a high-end proposition, so most people will be seeing lower scores. This might even put 1,280 x 1,024 with FSAA and AF out of reach, depending on the CPU.
If you only play games at 1,024 x 768 then the standard X800 is a great choice and going for a more expensive card can’t really be justified. But above this in newer games, the benefits of a 16-pipe card can be clearly seen. With a DirectX 8.1 title like Unreal Tournament 2004 the X800 acquitted itself well even at maximum settings, but for newer titles it hasn’t quite got the horsepower to compete.
This means that the price to performance sweet spot for ATI is still the X800XL. As far as nVidia goes, seeing as the X800 offers 256MB compared to 128MB and that the GeForce 6800 standard lacks the SLI compatibility to muddy the waters, the X800 blows the standard GeForce 6800 out of the water.
If you can't stretch the budget to a X800 XL the X800 is a good alternative and at £166 it’s not too far off the price of a single 6600GT. For those that don't want the costs associated with going down nVidia's SLI route it's a sensible choice.